Intrinsic magnetic properties of SmFe12-xVx alloys with reduced V-concentration

JOURNAL OF ALLOYS AND COMPOUNDS

卷:786

Article

Schonhobel, A. M.^1,2  Madugundo, R.¹  Vekilova, O. Yu³  Eriksson, O.^3,4  Herper, H. C.³  Barandiaran, J. M.^1,2  Hadjipanayis, G. C.⁵ 

[1] Univ Basque Country, BCMat, Sci Pk, E-48940 Leioa, Spain

[2] Univ Basque Country, UPV EHU, Dept Elect & Elect, Leioa 48940, Spain

[3] Uppsala Univ, Dept Phys & Astron, Box 516, S-75121 Uppsala, Sweden

[4] Orebro Univ, Sch Sci & Technol, SE-70182 Orebro, Sweden

[5] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

关键词: Rare-earth lean permanent magnets;    ThMn12-type structure;    Iron alloys;    Magnetocrystalline anisotropy;    Ab initio calculations;    Density functional theory;   

DOI  :  10.1016/j.jallcom.2019.01.332

来源: Elsevier

【 摘 要 】

In this work, we present experimental and theoretical results on SmFe12-xVx (x = 0.5 - 2.0) alloys with the ThMn12 (1:12) structure as possible candidates for rare earth-lean permanent magnets. The compound with x = 2 has been previously reported to have a Curie temperature of 330 degrees C, saturation magnetization of about 80 Am-2/kg, and anisotropy field around 9 T. We have synthesized the SmFe11V compound with a nearly pure 1:12 phase; the x = 0.5 compound couldn't be synthesized. The relative stability of the x = 1, 2 compounds was addressed theoretically by enthalpy calculations from first principles. The newly synthesized SmFe11V compound has a Curie temperature of 361 degrees C and saturation magnetization of 115 Am-2/kg (1.12 T). The anisotropy field has been obtained in magnetically-oriented fine powders, and is around 11 T. These parameters make SmFe11V a good candidate for a new kind of high energy, rare earth-lean permanent magnets. (C) 2019 Elsevier B.V. All rights reserved.

【 授权许可】

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